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CO2探测仪星上辐射定标设计方法的研究

发布日期:2015-05-14| 阅读次数: | 关键字:38-4 | 作者:薛浩,纪振华,蔺超,韦跃峰 | 来源:长春理工大学学报:自然科学版 2015 Vol.38(4): 006-011

CO2探测仪星上辐射定标设计方法的研究

薛浩,纪振华,蔺超,韦跃峰

(中国科学院长春光学精密机械与物理研究所,长春130033

摘要:为了使CO2 探测仪性能变化得到校正,对CO2 探测仪的星上辐射定标方法进行了研究。首先,利用稳定辐射源太阳与漫反射板相结合实现CO2 探测仪探测器绝对辐射定标,其次,以定标灯、漫反射板与定标探测器相结合的方法对漫反射板反射率进行监视,实现CO2 探测仪的相对辐射定标。最后,采用双定标灯、双定标探测器相互比对的方法对定标灯、定标探测器的性能变化进行校正,进而实现CO2 探测仪的高精度星上辐射定标。实验结果表明:星上定标灯稳定性优于1%,星上定标探测器线性度优于0.01%。方案可以实现CO2探测仪绝对辐射定标5%,相对辐射定标3%的精度要求。

关键词:星上辐射定标;漫反射板;星上定标灯;绝对定标;相对定标

中图分类号: TP394.1TH691.9 文献标识码:A 文章编号:1672-9870201504-0006-06

Research on Design Method of Radiometric

Calibration in Orbit of CO2 Detector

XUE HaoJI ZhenhuaLIN ChaoWEI Yuefeng

Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033

AbstractIn order to make the changes in performance of CO2 detector get correctedit studied the method of satellite

radiometric calibration of CO2 detector. Firstlyit used the combination of the sun and diffuse board to achieve absolute radiometric calibration of detectors on CO2 detector. Secondlyto get a relative radiometric calibrationit monitored the reflectivity of diffuse board through a combination of calibration lampdiffuse board and calibration detector. Finallyit corrected the performance changes in the calibration lamps and calibration detectors using the method of comparison dual calibration lamps and dual calibration detectors. And thenit realized high-precision satellite radiometric calibration on the CO2 detector. The experimental results showed that the calibration lamp's stability was better than 1% the calibration detector's linearity was better than 0.01%. All in allthe absolute and relative radiometric calibration accuracy on CO2 detector met the requirement of accuracywhich were 5% and 3%.

Key wordsradiometric calibration in orbitdiffuse boardcalibration lamp in orbitabsolute calibrationrelative calibration

 

作者简介:薛浩(1988-),男,硕士,研究实习员,E-mail1988xuehao@163.com

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